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  GBase8s内部用户可用限制会话数量
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  <time datetime="2023-05-10T01:27:21.000Z" itemprop="datePublished">2023-05-10</time>
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  <h2 id="内部用户的配置步骤"><a href="#内部用户的配置步骤" class="headerlink" title="内部用户的配置步骤"></a>内部用户的配置步骤</h2><figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br></pre></td><td class="code"><pre><span class="line">GBase 8s支持内部用户，但默认情况下并不是开启的，需要手工开启。</span><br><span class="line">以下以GBase 8s v8.8_2.0.1a2_2版本为例示范如何使用内部用户（mapping user)</span><br><span class="line"></span><br><span class="line">1，配置allowed.surrogates</span><br><span class="line">在/etc/gbasedbt（如没有，使用root用户创建）下创建allowed.surrogates配置文件，内容如下：</span><br><span class="line">USERS:daemon</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">2，使用gbasedbt用户执行以下命令，使数据库开启USERMAPPING</span><br><span class="line">onmode -wf USERMAPPING=ADMIN</span><br><span class="line"></span><br><span class="line">3，使用gbasedbt用户执行以下命令，加载surrogates到缓存</span><br><span class="line">onmode -cache surrogates</span><br><span class="line"></span><br><span class="line">4，在sysuser库中创建系统默认用户，可以指定默认目录(默认目录的权限为777)</span><br><span class="line">CREATE DEFAULT USER WITH PROPERTIES USER daemon HOME &quot;/home/gbase8t/users&quot; ;</span><br><span class="line"></span><br><span class="line">5，使用gbasedbt创建普通用户，并指定密码。</span><br><span class="line">注：密码需要符合安全密码要求(不少于8位，至少包含大写、小写字母，数字)</span><br><span class="line">CREATE USER dbtuser WITH PASSWORD &#x27;GBase123&#x27;;</span><br><span class="line"></span><br><span class="line">6，使用dba用户在数据库中赋权访问</span><br><span class="line">echo &quot;grant connect to dbtuser;&quot; | dbaccess testdb -</span><br><span class="line"></span><br><span class="line">7，使用内部用户访问数据库，按提示输入密码</span><br><span class="line">dbaccess - -</span><br><span class="line">CONNECT TO &#x27;testdb@gbase01&#x27; USER &#x27;dbtuser&#x27;;</span><br></pre></td></tr></table></figure>





<h2 id="内部用户可用限制会话数量"><a href="#内部用户可用限制会话数量" class="headerlink" title="内部用户可用限制会话数量"></a>内部用户可用限制会话数量</h2><h5 id="SESSION-PER-USER-子句"><a href="#SESSION-PER-USER-子句" class="headerlink" title="SESSION_PER_USER 子句"></a>SESSION_PER_USER 子句</h5><figure class="highlight sql"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line">SESSION_PER_USER n：在一个实例中，一个用户可以同时拥有的会话数量，正整数，n 的取值范围为：[<span class="number">1</span>,<span class="number">231</span> <span class="number">-1</span>]。</span><br><span class="line"></span><br><span class="line"><span class="comment">--例如以下语句创建用户名为user1001，密码为123456，os_user为映射的操作系统用户，限制该用户的会话连接数为5：</span></span><br><span class="line"><span class="keyword">CREATE</span> <span class="keyword">USER</span> user1001 <span class="keyword">WITH</span> PASSWORD ‘<span class="number">123456</span>’ PROPERTIES <span class="keyword">USER</span> os_user SESSION_PER_USER <span class="number">5</span>;</span><br><span class="line"></span><br><span class="line"><span class="comment">--如下即可：</span></span><br><span class="line"><span class="keyword">CREATE</span> <span class="keyword">USER</span> wangwei2 <span class="keyword">WITH</span> PASSWORD <span class="string">&#x27;GBase123&#x27;</span> PROPERTIES <span class="keyword">USER</span> daemon SESSION_PER_USER <span class="number">5</span>;</span><br><span class="line"></span><br><span class="line"><span class="comment">--如下即可：</span></span><br><span class="line">dbaccess sysuser <span class="operator">&lt;&lt;</span><span class="operator">!</span></span><br><span class="line"><span class="keyword">CREATE</span> <span class="keyword">USER</span> wangwei3 <span class="keyword">WITH</span> PASSWORD <span class="string">&#x27;GBase123&#x27;</span> PROPERTIES <span class="keyword">USER</span> daemon SESSION_PER_USER <span class="number">50</span>;</span><br><span class="line"><span class="operator">!</span></span><br></pre></td></tr></table></figure>



<h5 id="测试连接数限制"><a href="#测试连接数限制" class="headerlink" title="测试连接数限制"></a>测试连接数限制</h5><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> com.trey;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> com.alibaba.druid.pool.DruidDataSource;</span><br><span class="line"><span class="keyword">import</span> org.junit.jupiter.api.Test;</span><br><span class="line"><span class="keyword">import</span> org.springframework.boot.test.context.SpringBootTest;</span><br><span class="line"></span><br><span class="line"><span class="meta">@SpringBootTest</span></span><br><span class="line"><span class="keyword">class</span> <span class="title class_">ConnectGBaseTestApplicationTests</span> &#123;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@Test</span></span><br><span class="line">    <span class="keyword">void</span> <span class="title function_">contextLoads</span><span class="params">()</span> &#123;</span><br><span class="line">        <span class="type">DruidDataSource</span> <span class="variable">dataSource1</span> <span class="operator">=</span> <span class="keyword">new</span> <span class="title class_">DruidDataSource</span>();</span><br><span class="line">        dataSource1.setDriverClassName(<span class="string">&quot;com.gbasedbt.jdbc.Driver&quot;</span>);</span><br><span class="line">        dataSource1.setUrl(<span class="string">&quot;jdbc:gbasedbt-sqli://1.1.1.2:9031/utf8:GBASEDBTSERVER=g31;CLIENT_LOCALE=zh_cn.utf8;DB_LOCALE=zh_cn.utf8;LOGINTIMEOUT=60000;IFX_LOCK_MODE_WAIT=60;APPENDISAM=true;UPPER_CASE=y;DBDATE=Y4MD&quot;</span>);</span><br><span class="line">        dataSource1.setUsername(<span class="string">&quot;wangwei3&quot;</span>);</span><br><span class="line">        dataSource1.setPassword(<span class="string">&quot;GBase123&quot;</span>);</span><br><span class="line">        dataSource1.setMaxActive(<span class="number">100</span>);</span><br><span class="line">        dataSource1.setInitialSize(<span class="number">100</span>);</span><br><span class="line">        dataSource1.setMinIdle(<span class="number">100</span>);</span><br><span class="line">        dataSource1.setTestWhileIdle(<span class="literal">false</span>);</span><br><span class="line">        </span><br><span class="line">        <span class="type">ExecutorService</span> <span class="variable">threadPool</span> <span class="operator">=</span> Executors.newCachedThreadPool();</span><br><span class="line">        threadPool.execute(() -&gt; &#123;</span><br><span class="line">            <span class="keyword">try</span> &#123;</span><br><span class="line">                dataSource1.getConnection();</span><br><span class="line">            &#125; <span class="keyword">catch</span> (SQLException e) &#123;</span><br><span class="line">                e.printStackTrace();</span><br><span class="line">            &#125;</span><br><span class="line">        &#125;);</span><br><span class="line">        System.out.println(<span class="string">&quot;100个链接在后台创建中...&quot;</span>);</span><br><span class="line"></span><br><span class="line">        <span class="comment">//主程序延时退出</span></span><br><span class="line">        <span class="keyword">try</span> &#123;</span><br><span class="line">            Thread.sleep(<span class="number">60000000</span>);</span><br><span class="line">        &#125; <span class="keyword">catch</span> (InterruptedException e) &#123;</span><br><span class="line">            e.printStackTrace();</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>



<h5 id="当运行上面的测试时，链接数达到阈值后java程序回收到如下报错"><a href="#当运行上面的测试时，链接数达到阈值后java程序回收到如下报错" class="headerlink" title="当运行上面的测试时，链接数达到阈值后java程序回收到如下报错"></a>当运行上面的测试时，链接数达到阈值后java程序回收到如下报错</h5><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line"><span class="number">100</span>个链接在后台创建中...</span><br><span class="line"><span class="number">2023</span>-<span class="number">02</span>-<span class="number">03</span> <span class="number">19</span>:08:<span class="number">59.888</span> ERROR <span class="number">13156</span> --- [pool-<span class="number">1</span>-thread-<span class="number">1</span>] com.alibaba.druid.pool.DruidDataSource   : init datasource error, url: jdbc:gbasedbt-sqli:<span class="comment">//1.1.1.2:9031/utf8:GBASEDBTSERVER=g31;CLIENT_LOCALE=zh_cn.utf8;DB_LOCALE=zh_cn.utf8;LOGINTIMEOUT=60000;IFX_LOCK_MODE_WAIT=60;APPENDISAM=true;UPPER_CASE=y;DBDATE=Y4MD</span></span><br><span class="line"></span><br><span class="line">java.sql.SQLException: Cannot create a user thread.</span><br><span class="line">	at com.gbasedbt.jdbc.IfxSqliConnect.&lt;init&gt;(IfxSqliConnect.java:<span class="number">1436</span>) ~[gbasedbtjdbc_3<span class="number">.3</span>.0_3_szdt.jar:<span class="number">3.3</span><span class="number">.0_3</span>]</span><br><span class="line">	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:<span class="number">1.8</span><span class="number">.0_333</span>]</span><br><span class="line">	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:<span class="number">62</span>) ~[na:<span class="number">1.8</span><span class="number">.0_333</span>]</span><br><span class="line">	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:<span class="number">45</span>) ~[na:<span class="number">1.8</span><span class="number">.0_333</span>]</span><br><span class="line">	at java.lang.reflect.Constructor.newInstance(Constructor.java:<span class="number">423</span>) ~[na:<span class="number">1.8</span><span class="number">.0_333</span>]</span><br><span class="line">	at com.gbasedbt.jdbc.Driver.connect(Driver.java:<span class="number">252</span>) ~[gbasedbtjdbc_3<span class="number">.3</span>.0_3_szdt.jar:<span class="number">3.3</span><span class="number">.0_3</span>]</span><br></pre></td></tr></table></figure>





<h2 id="测试环境参考："><a href="#测试环境参考：" class="headerlink" title="测试环境参考："></a>测试环境参考：</h2><figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br></pre></td><td class="code"><pre><span class="line">[gbasedbt@wei2 ~]$ cd /home/gbasedbt/</span><br><span class="line">[gbasedbt@wei2 gbasedbt]$ ls</span><br><span class="line">csdk330_profile  g31.profile</span><br><span class="line">[gbasedbt@wei2 gbasedbt]$ . g31.profile </span><br><span class="line">gbasedbt:g31[/home/gbasedbt]$dbaccess sysuser -</span><br><span class="line"></span><br><span class="line">Database selected.</span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">&gt; </span><span class="language-bash">infor tables;</span></span><br><span class="line"></span><br><span class="line">  201: A syntax error has occurred.</span><br><span class="line">Error in line 1</span><br><span class="line">Near character position 1</span><br><span class="line"><span class="meta prompt_">&gt; </span><span class="language-bash">info tables;</span></span><br><span class="line"></span><br><span class="line"></span><br><span class="line">Table name</span><br><span class="line"></span><br><span class="line">sysauth            sysdbsecadmauth    sysintauthusers    syssecpara        </span><br><span class="line">syssurrogategroups syssurrogates      systcxattributes   systcxusers       </span><br><span class="line">systrustedcontext  sysusercursess     sysuserext         sysuserlimits     </span><br><span class="line">sysusermap         sysuseros          </span><br><span class="line"></span><br><span class="line">Elapsed time: 0.615 sec</span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">&gt; </span><span class="language-bash"><span class="keyword">select</span> * from sysusermap;</span></span><br><span class="line"></span><br><span class="line"></span><br><span class="line">username                         surrogate_id </span><br><span class="line"></span><br><span class="line">public                                      1</span><br><span class="line">dbtuser                                     1</span><br><span class="line">wangwei                                     1</span><br><span class="line">wangwei2                                    2</span><br><span class="line">wangwei3                                    2</span><br><span class="line"></span><br><span class="line">5 row(s) retrieved.</span><br><span class="line"></span><br><span class="line">Elapsed time: 0.052 sec</span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">&gt; </span><span class="language-bash"><span class="keyword">select</span> * from syssurrogates ;</span></span><br><span class="line"></span><br><span class="line"></span><br><span class="line"></span><br><span class="line">surrogate_id  1</span><br><span class="line">os_username   daemon</span><br><span class="line">uid           0</span><br><span class="line">gid           0</span><br><span class="line">groupname     </span><br><span class="line">homedir       /home/gbase_daemon_dir</span><br><span class="line">userauth      ----------</span><br><span class="line"></span><br><span class="line">surrogate_id  2</span><br><span class="line">os_username   daemon</span><br><span class="line">uid           0</span><br><span class="line">gid           0</span><br><span class="line">groupname     </span><br><span class="line">homedir       </span><br><span class="line">userauth      ----------</span><br><span class="line"></span><br><span class="line">2 row(s) retrieved.</span><br><span class="line"></span><br><span class="line">Elapsed time: 0.060 sec</span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">&gt; </span><span class="language-bash"></span></span><br><span class="line"><span class="language-bash"></span></span><br><span class="line">Database closed.</span><br><span class="line"></span><br><span class="line">gbasedbt:g31[/home/gbasedbt]$ls -l </span><br><span class="line">总用量 8</span><br><span class="line">-rwxr-xr-x. 1 gbasedbt gbasedbt 603 2月   3 16:28 csdk330_profile</span><br><span class="line">-rwxr-xr-x. 1 gbasedbt gbasedbt 768 2月   3 16:27 g31.profile</span><br><span class="line">gbasedbt:g31[/home/gbasedbt]$ls -l /home/gbase_daemon_dir</span><br><span class="line">ls: 无法访问/home/gbase_daemon_dir: 没有那个文件或目录</span><br><span class="line">gbasedbt:g31[/home/gbasedbt]$</span><br></pre></td></tr></table></figure>

 
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